EP 2099027 A1 20090909 - Method and apparatus for transforming between different filter bank domains
Title (en)
Method and apparatus for transforming between different filter bank domains
Title (de)
Verfahren und Vorrichtung zur Umwandlung zwischen verschiedenen Filterbankdomänen
Title (fr)
Procédé et appareil pour la transformation entre différents domaines de banc de filtres
Publication
Application
Priority
EP 08102308 A 20080305
Abstract (en)
Filter banks may have different structures and different individual output signal domains. Often a translation between different filter bank domains is desirable. Usually, mapping matrices are used that however vary over frequency. This requires a significant amount of lookup tables. A method for transforming first data frames of a first filter bank domain (D S ) to second data frames of a different second filter bank domain (D T ), comprises steps of transcoding sub-bands (mp3(m-1),mp3(m),mp3(m+1)) of the first filter bank domain (D S ) into sub-bands (psdo(m-1), psdo(m),psdo(m+1)) of an intermediate domain (D i ) that corresponds to said second filter bank domain but has warped phase, and transcoding the sub-bands (psdo(m-1), psdo(m), psdo(m+1)) of the intermediate domain (D i ) to sub-bands (MDCT(m-1),MDCT(m),MDCT(m+1)) of the second filter bank domain (D T ), wherein a phase correction (SSC,PCp,PC, PCn) is performed on the sub-bands of the intermediate domain (D i ).
IPC 8 full level
G10L 19/14 (2006.01); G10L 19/16 (2013.01); H04N 7/26 (2006.01); G10L 19/02 (2013.01)
CPC (source: EP US)
G10L 19/173 (2013.01 - EP US); G10L 19/0204 (2013.01 - EP US); G10L 19/0212 (2013.01 - EP US)
Citation (applicant)
EP 1903559 A1 20080326 - THOMSON BRANDT GMBH [DE]
Citation (search report)
- [A] FR 2901433 A1 20071123 - FRANCE TELECOM [FR]
- [A] US 2005240398 A1 20051027 - CHEN WEI-GE [US], et al
- [A] KOICHI TAKAGI ET AL: "Conversion of MP3 to AAC in the Compressed Domain", MULTIMEDIA SIGNAL PROCESSING, 2006 IEEE 8TH WORKSHOP ON, IEEE, PI, 1 October 2006 (2006-10-01), pages 132 - 135, XP031011035, ISBN: 978-0-7803-9751-4
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MT NL NO PL PT RO SE SI SK TR
Designated extension state (EPC)
AL BA MK RS
DOCDB simple family (publication)
EP 2099027 A1 20090909; AU 2009221366 A1 20090911; AU 2009221366 B2 20110929; BR PI0907840 A2 20150721; CA 2717226 A1 20090911; CN 101960515 A 20110126; CN 101960515 B 20120718; EP 2250642 A1 20101117; EP 2250642 B1 20151021; JP 2011513781 A 20110428; JP 5490731 B2 20140514; KR 101589709 B1 20160128; KR 20100134635 A 20101223; US 2011004478 A1 20110106; US 8620671 B2 20131231; WO 2009109468 A1 20090911
DOCDB simple family (application)
EP 08102308 A 20080305; AU 2009221366 A 20090219; BR PI0907840 A 20090219; CA 2717226 A 20090219; CN 200980107325 A 20090219; EP 09716549 A 20090219; EP 2009051989 W 20090219; JP 2010549083 A 20090219; KR 20107022192 A 20090219; US 73596109 A 20090219